Dirickson was last seen at his farmhouse in Strong City, Oklahoma, on March 14, 1998. According to his 16-year-old son, an unidentified Caucasian male arrived at their home during the day, driving a white 1994 Ford F-150 extended cab pickup truck. The vehicle had a yellow tag on the front and may have displayed New Mexico license plates. Dirickson’s son reported that the man was interested in viewing a horse his father had for sale. He stated that Dirickson mentioned plans to travel with the man to Elk City, Oklahoma, and Mobeetie, Texas, with the intention of returning to the farm later that evening. However, Dirickson has not been seen or heard from since. Authorities have not confirmed whether the unidentified man was involved in Dirickson’s disappearance. The man is described as approximately 6’2”, 210 pounds, and right-handed, with a full reddish-brown beard. He appeared to be around 41 years old at the time and was last seen wearing a blue jacket, a striped Western-style shirt, blue jeans, and a black baseball cap featuring a red “No Fear” logo.